DC socket structure

Abstract

The direct-current socket structure comprises a cover plate, a protection door, a spring, a pressing plate, a negative electrode plug bush assembly, a positive electrode plug bush assembly and a base, and the protection door slides to a second position under the combined action of external force applied to the negative electrode shielding part and the positive electrode shielding part; the spring drives the protection door to slide to a first position, so that the anode shielding part shields the first anode through hole, and the cathode shielding part shields the first cathode through hole; the pressing plate is provided with a first blocking rib and a second blocking rib in a protruding mode. Only under the action of external force on the negative electrode shielding part, the protection door can rotate to the first blocking rib to block the path of the negative electrode shielding part moving towards the second position; and the protection door can rotate to the second blocking rib to block the path of the positive electrode shielding part moving towards the second position only under the action of external force on the positive electrode shielding part. According to the DC socket structure of the utility model, the protection door slides and is pushed away when the two sides are stressed, so that a plug can be smoothly inserted into the socket, and the protection door rotates and is blocked by the blocking rib when the single side is stressed, so that the protection door cannot be pushed away.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to a DC socket structure. Background Technology

[0002] With the rapid development of DC power supply systems, DC sockets and DC plugs are being used more and more widely. However, existing DC sockets have poor protection against electric shock. The safety shutters of DC sockets can be pushed open even when force is applied from one side (e.g., when a single pin of the plug is inserted into the socket), leading to the risk of electric shock.

[0003] In addition, because the positive and negative pins of the DC plug are asymmetrically arranged, the cross-sections of the positive and negative pins of the DC plug are usually rectangular and the length directions of the cross-sections are perpendicular to each other. This causes uneven force on both sides of the protection door of the DC socket when the DC plug is inserted into the DC socket, resulting in the DC plug not being inserted smoothly into the DC socket and poor protection against electric shock. Utility Model Content

[0004] The purpose of this utility model is to overcome at least one defect of the prior art and provide a DC socket structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The DC socket structure includes a cover, a protective door, a spring, a pressure plate, a negative socket assembly, a positive socket assembly, and a base.

[0007] The negative electrode socket assembly and the positive electrode socket assembly are disposed in the inner cavity of the base, and the pressure plate is disposed on the base to confine the negative electrode socket assembly and the positive electrode socket assembly within the inner cavity;

[0008] The cover plate covers the pressure plate, which confines the protective door and the spring between the cover plate and the pressure plate. The cover plate is provided with a first negative electrode through hole and a first positive electrode through hole. The length direction of the first negative electrode through hole is set along a first direction, and the length direction of the first positive electrode through hole is set along a second direction. The first direction and the second direction are perpendicular to each other.

[0009] The pressure plate is provided with a second negative electrode through hole corresponding to the first negative electrode through hole and a second positive electrode through hole corresponding to the first positive electrode through hole;

[0010] The protective door includes a negative electrode blocking part and a positive electrode blocking part. The protective door is slidably configured to slide between a first position and a second position.

[0011] The protective door can slide from the first position to the second position under the combined action of external forces on both the negative electrode blocking part and the positive electrode blocking part; the spring is used to drive the protective door to slide from the second position to the first position, so that the positive electrode blocking part blocks the first positive electrode through hole and the negative electrode blocking part blocks the first negative electrode through hole.

[0012] The pressure plate protrusion is provided with a first baffle and a second baffle;

[0013] The protective door can only rotate until the first baffle blocks the path of the negative electrode blocking part to the second position when the negative electrode blocking part is subjected to external force.

[0014] The protective door can only rotate until the second baffle blocks the path of the positive electrode blocking part moving to the second position when the positive electrode blocking part is subjected to external force.

[0015] Optionally, the pressure plate protrusion is provided with a sliding rib located between the second negative electrode through hole and the second positive electrode through hole, and the protection door further includes a sliding part connected between the negative electrode shielding part and the positive electrode shielding part, and the protection door is mounted on the sliding rib through the sliding part.

[0016] Optionally, the length direction of the sliding rib is arranged along the second direction, and the surface of the sliding rib that cooperates with the sliding part is an arc-shaped surface; the surface of the sliding part that cooperates with the sliding rib is a plane.

[0017] Optionally, the negative electrode blocking part has a negative electrode driving slope corresponding to the first negative electrode through hole on one side in the second direction, and the positive electrode blocking part has a positive electrode driving slope corresponding to the first positive electrode through hole on one side in the first direction.

[0018] Optionally, the plane formed by the first direction and the second direction is a common plane, and the projections of the hypotenuse of the negative driving slope and the hypotenuse of the positive driving slope onto the common plane are perpendicular to each other.

[0019] Optionally, the first baffle is a straight-line structure located on one side of the second negative electrode through hole in the second direction, and the negative electrode blocking part is provided with a first limiting surface that cooperates with the first baffle.

[0020] Optionally, the second baffle is an L-shaped structure located on one side of the second positive electrode through hole in the second direction. The positive electrode blocking part is provided with a limiting groove that cooperates with one end of the second baffle on the side facing the pressure plate. The positive electrode blocking part is also provided with a second limiting surface that cooperates with the other end of the second baffle.

[0021] Optionally, the cover plate has a positioning ring protruding on the side facing the pressure plate, and the protective door is slidably disposed within the positioning ring by a spring.

[0022] Optionally, the cover plate is provided with a first spring limiting part for one end of the limiting spring, and a second spring limiting part for the other end of the limiting spring is provided between the negative pole blocking part and the positive pole blocking part of the protective door.

[0023] And / or, the cover plate has a sliding rib protruding on the side facing the pressure plate, and the sliding rib is located between the first negative electrode through hole and the first positive electrode through hole.

[0024] Optionally, the protective door is a one-line block structure formed by sequentially connecting the negative electrode blocking part, the sliding part, and the positive electrode blocking part along the first direction.

[0025] The structure of this DC socket allows the protective door to slide open when force is applied from both sides, enabling the plug to be smoothly inserted into the socket. When force is applied from one side, the protective door rotates but is blocked by a retaining rib, preventing it from being pushed open. In other words, a single plug cannot open the protective door, thus improving the socket's anti-electric shock performance.

[0026] In addition, both the negative and positive pins act on the long side of the protective door, which can drive the protective door more reliably and stably, improve the smoothness of the protective door opening, and thus make the plug insertion smoother.

[0027] Furthermore, corresponding to the asymmetrically arranged negative and positive pins, the negative and positive driving ramps are also asymmetrically arranged. The projections of the inclined sides of the negative and positive driving ramps are perpendicular to each other, increasing the contact area between the pins and the protective door, and enabling more reliable and stable driving of the protective door. Attached Figure Description

[0028] Figure 1 This is an exploded view of the DC socket structure of this utility model;

[0029] Figure 2 This is a structural schematic diagram of the front of the DC socket structure of this utility model;

[0030] Figure 3 This is a utility model Figure 2 AA cross-section view;

[0031] Figure 4 This is a utility model Figure 2 BB cross-section;

[0032] Figure 5 This is a utility model Figure 2 CC cross-section;

[0033] Figure 6 This is a schematic diagram of the front of the plug and DC socket structure of this utility model;

[0034] Figure 7 This is a utility model Figure 6DD cross-section;

[0035] Figure 8 This is a utility model Figure 6 EE cross-section;

[0036] Figure 9 This is a schematic diagram of the front of the negative electrode plug and DC socket structure of this utility model;

[0037] Figure 10 This is a utility model Figure 9 FF cross-sectional view;

[0038] Figure 11 This is a utility model Figure 9 GG cross-section;

[0039] Figure 12 This is a schematic diagram of the front of the positive electrode plug and DC socket structure of this utility model;

[0040] Figure 13 This is a utility model Figure 12 HH cross-section diagram;

[0041] Figure 14 This is a schematic diagram of the protective door and pressure plate of this utility model, showing the protective door in the first position;

[0042] Figure 15 This is a schematic diagram of the protective door and pressure plate of this utility model, showing the position of the protective door when the negative electrode pin is inserted;

[0043] Figure 16 This is a schematic diagram of the protective door and pressure plate of this utility model, showing the position of the protective door when the positive electrode pin is inserted;

[0044] Figure 17 This is a schematic diagram of the structure of the panel of this utility model;

[0045] Figure 18 This is a schematic diagram of the structure of the cover plate of this utility model;

[0046] Figure 19 This is a structural schematic diagram of the front of the protective door of this utility model;

[0047] Figure 20 This is a structural schematic diagram of the back of the protective door of this utility model;

[0048] Figure 21 This is a structural schematic diagram of the front of the pressure plate of this utility model;

[0049] Figure 22 This is a schematic diagram of the structure of the back of the pressure plate of this utility model;

[0050] Figure 23This is a structural schematic diagram of the negative electrode socket assembly of this utility model;

[0051] Figure 24 This is a schematic diagram of the positive electrode socket assembly of this utility model;

[0052] Figure 25 This is a schematic diagram of the structure of the base of this utility model.

[0053] Panel 1; Negative socket 12; Positive socket 13;

[0054] Cover plate 2; First negative electrode through hole 22; First positive electrode through hole 23; Sliding rib 24; Positioning ring 25; First spring limiting part 26;

[0055] Protective door 3; negative electrode shielding part 31; negative electrode driving inclined surface 311; first limiting surface 312; positive electrode shielding part 32; positive electrode driving inclined surface 321; limiting groove 322; second limiting surface 323; sliding part 33; second spring limiting part 34;

[0056] Spring 4;

[0057] Pressure plate 5; Second negative electrode through hole 52; Second positive electrode through hole 53; First baffle 54; Second baffle 55; Sliding rib 56;

[0058] Negative terminal assembly 6; negative terminal 61; negative terminal 62;

[0059] Positive terminal assembly 7; Positive terminal 71; Positive terminal 72;

[0060] Base 8; Inner cavity 82; Positioning cavity 83;

[0061] Plug 9; Negative pin 91; Positive pin 92. Detailed Implementation

[0062] The specific embodiments of the DC socket structure of this utility model are further described below with reference to the accompanying drawings. The DC socket structure of this utility model is not limited to the descriptions in the following embodiments.

[0063] like Figures 1-5 As shown, the DC socket structure of this embodiment, used for mating with the plug 9, includes a cover plate 2, a protective door 3, a spring 4, a pressure plate 5, a negative socket assembly 6, a positive socket assembly 7, and a base 8. The negative socket assembly 6 typically includes a negative socket 61 and a negative terminal 62. Figure 23 The positive terminal assembly 7 typically includes a positive terminal 71 and a positive terminal 72. Figure 24The negative terminal socket assembly 6 and the positive terminal socket assembly 7 are disposed within the inner cavity 82 of the base 8. The pressure plate 5 is disposed on the base 8 and confines the negative terminal socket assembly 6 and the positive terminal socket assembly 7 within the inner cavity 82. The cover plate 2 covers the pressure plate 5 and confines the protective door 3 and the spring 4 between the cover plate 2 and the pressure plate 5. The base 8 is usually disposed in a mounting groove in a mounting position (e.g., a wall). The DC socket structure usually also includes a panel 1, which covers the base 8 to make the socket more aesthetically pleasing.

[0064] like Figures 6-8 As shown, the plug 9 typically includes a negative pin 91 and a positive pin 92. The cross-sections of the negative pin 91 and the positive pin 92 are usually rectangular, and their length directions are perpendicular to each other. Correspondingly, the negative socket 61 and the positive socket 71 also adopt a corresponding arrangement, that is, the cross-sectional directions of the negative socket 61 and the positive socket 71 are perpendicular to each other; as shown... Figure 17 As shown, panel 1 has a negative socket 12 that mates with negative pin 91 and a positive socket 13 that mates with positive pin 92. The length directions of negative socket 12 and positive socket 13 are perpendicular to each other. If necessary, plug 9 may also include a ground pin. Correspondingly, the DC socket structure includes a ground plug assembly disposed in the inner cavity 82 and a ground socket disposed on panel 1.

[0065] In this embodiment, as Figure 18 As shown, the cover plate 2 is provided with a first negative electrode through hole 22 and a first positive electrode through hole 23. The length direction of the first negative electrode through hole 22 is arranged along a first direction, and the length direction of the first positive electrode through hole 23 is arranged along a second direction. The first direction and the second direction are perpendicular to each other. Figures 21-22 As shown, the pressure plate 5 is provided with a second negative electrode through hole 52 corresponding to the first negative electrode through hole 22 and a second positive electrode through hole 53 corresponding to the first positive electrode through hole 23.

[0066] like Figures 19-20As shown, the protective door 3 includes a negative electrode blocking part 31 and a positive electrode blocking part 32. The protective door 3 is slidably disposed and can slide between a first position and a second position. During the insertion of the plug 9 into the socket, when the negative electrode pin 91 of the plug 9 acts on the negative electrode blocking part 31 of the protective door 3 and the positive electrode pin 92 acts on the positive electrode blocking part 32 of the protective door 3, due to the balanced force on the protective door 3, under the combined action of external forces on both the negative electrode blocking part 31 and the positive electrode blocking part 32, the protective door 3 can slide from the first position to the second position, so that the first negative electrode through hole 22 and the second negative electrode through hole 52 are connected, and the first positive electrode through hole 23 and the second positive electrode through hole 53 are connected, that is, the negative electrode pin 91 and the positive electrode pin 92 of the plug 9 can be inserted accordingly. In the negative socket 61 of the negative socket assembly 6 and the positive socket 71 of the positive socket assembly 7; when the plug 9 is pulled out of the socket, that is, when the external force applied to the negative shielding part 31 and the positive shielding part 32 is removed, the spring 4 is used to drive the protective door 3 to slide from the second position to the first position, so that the positive shielding part 32 blocks the first positive through hole 23 and the negative shielding part 31 blocks the first negative through hole 22, that is, the negative pin 91 and the positive pin 92 of the plug 9 cannot be inserted into the negative socket 61 of the negative socket assembly 6 and the positive socket 71 of the positive socket assembly 7.

[0067] In particular, such as Figure 21 As shown, the pressure plate 5 has a protrusion with a first baffle 54 and a second baffle 55. Figures 9-11 , Figure 15 As shown, during the process of inserting only the negative pin 91 of the plug 9 into the socket, when the negative pin 91 of the plug 9 acts on the negative blocking part 31 of the protective door 3, due to the uneven force on the protective door 3, the protective door 3 can only rotate to the first stop 54 blocking the path of the negative blocking part 31 moving to the second position under the action of the external force (the force of the negative pin 91 of the plug 9) on the negative blocking part 31. That is, the negative pin 91 of the plug 9 cannot be inserted into the negative plug sleeve 61 of the negative plug sleeve assembly 6.

[0068] like Figures 12-13 , Figure 16 As shown, during the process of inserting only the positive pin 92 of the plug 9 into the socket, when the positive pin 92 of the plug 9 acts on the positive blocking part 32 of the protective door 3, due to the uneven force on the protective door 3, the protective door 3 can only rotate to the second stop 55 blocking the path of the positive blocking part 32 moving to the second position under the action of the external force (the force of the positive pin 92) on the positive blocking part 32. That is, the positive pin 92 of the plug 9 cannot be inserted into the positive socket 71 of the positive socket assembly 7.

[0069] In this embodiment of the DC socket structure, the protective door 3 slides open when both sides (negative shielding part 31 and positive shielding part 32) are subjected to force, allowing the plug 9 to be smoothly inserted into the socket. When the protective door 3 is subjected to force on one side (negative shielding part 31 or positive shielding part 32), it rotates and is blocked by the stop rib (first stop rib 54 or second stop rib 55), preventing the protective door 3 from being pushed open. That is, a single plug cannot open the protective door 3, thus improving the socket's anti-electric shock performance.

[0070] like Figures 19-21 As shown in the diagram, the protective door 3 and the pressure plate 5 in this embodiment have a mating structure. The pressure plate 5 has a protruding sliding rib 56 located between the second negative electrode through hole 52 and the second positive electrode through hole 53. The protective door 3 also includes a sliding part 33 connecting the negative electrode blocking part 31 and the positive electrode blocking part 32. The protective door 3 is supported on the sliding rib 56 via the sliding part 33. The sliding rib 56 serves as a fulcrum for the rotation of the protective door 3 and also reduces the contact area between the protective door 3 and the pressure plate 5, thereby reducing the sliding friction of the protective door 3 and making the operation of the protective door 3 smoother.

[0071] Specifically, the protective door 3 is a one-line block structure formed by the negative electrode blocking part 31, the sliding part 33 and the positive electrode blocking part 32 being integrally connected along the first direction.

[0072] Preferably, the length direction of the sliding rib 56 is arranged along the second direction, and the surface of the sliding rib 56 that cooperates with the sliding part 33 is an arc-shaped surface; the surface of the sliding part 33 that cooperates with the sliding rib 56 is a plane.

[0073] like Figure 8 , Figure 19 As shown, in the driving structure of the protective door 3 in this embodiment, the negative electrode blocking part 31 of the protective door 3 is provided with a negative electrode driving inclined surface 311 corresponding to the first negative electrode through hole 22 on one side in the second direction, and the positive electrode blocking part 32 is provided with a positive electrode driving inclined surface 321 corresponding to the first positive electrode through hole 23 on one side in the first direction. In this embodiment, the plane formed by the first direction and the second direction is a common plane, and the projections of the inclined side of the negative electrode driving inclined surface 311 and the inclined side of the positive electrode driving inclined surface 321 onto the common plane form an angle.

[0074] During the insertion of plug 9 into the socket, the edge of negative pin 91 along its cross-sectional length acts on negative drive ramp 311, and the edge of positive pin 92 along its cross-sectional length acts on positive drive ramp 321, causing the protective door 3 to slide from the first position to the second position. Negative drive ramp 311 is located on one side of the width direction (i.e., the second direction) of the first negative through hole 22, and positive drive ramp 321 is located on one side of the width direction (i.e., the first direction) of the first positive through hole 23. Both negative pin 91 and positive pin 92 act on the protective door 3 with their long sides, reliably and stably driving the protective door 3, improving the smoothness of opening the protective door 3, and thus making plug 9 insertion smoother.

[0075] Of course, as another embodiment, the positive drive slope 321 is provided on one side of the positive shielding part 32 of the protection door 3 in the second direction, that is, the positive drive slope 321 and the negative drive slope 311 are provided on the same side of the protection door 3 in the second direction. During the process of inserting the plug 9 into the socket, the edge of the positive pin 92 provided along the cross-sectional width direction acts on the positive drive slope 321.

[0076] Preferably, the projections of the hypotenuses of the negative drive inclined surface 311 and the positive drive inclined surface 321 onto the common plane are perpendicular to each other. That is, the projection of the hypotenuse of the negative drive inclined surface 311 onto the common plane is set along the second direction, and the projection of the hypotenuse of the positive drive inclined surface 321 onto the common plane is set along the first direction. In this embodiment, the hypotenuse of the negative drive inclined surface 311 refers to the intersection line between the negative drive inclined surface 311 and the plane perpendicular to the first direction, and the hypotenuse of the positive drive inclined surface 321 refers to the intersection line between the positive drive inclined surface 321 and the plane perpendicular to the second direction. Corresponding to the asymmetrically arranged negative pin 91 and positive pin 92, the negative drive inclined surface 311 and the positive drive inclined surface 321 are also asymmetrically arranged, with the projections of the hypotenuses of the negative drive inclined surface 311 and the positive drive inclined surface 321 being perpendicular to each other. This increases the contact area between the pin and the protective door 3, enabling more reliable and stable driving of the protective door 3.

[0077] like Figure 15 , Figure 21 As shown, the first baffle 54 has a straight-line structure and is located on one side of the second negative electrode through hole 52 in the second direction. The negative electrode blocking part 31 is provided with a first limiting surface 312 that cooperates with the first baffle 54. Figure 15 As shown, during the process of inserting only the negative pin 91 of the plug 9 into the socket, the negative pin 91 presses down on the negative blocking part 31 of the protective door 3. At this time, the first baffle 54 and the first limiting surface 312 cooperate to block in the second direction.

[0078] like Figure 16 , Figure 21As shown, the second baffle 55 has an L-shaped structure and is located on one side of the second positive electrode through hole 53 in the second direction. The positive electrode blocking part 32 has a limiting groove 322 that mates with one end of the second baffle 55 on the side facing the pressure plate 5. The positive electrode blocking part 32 also has a second limiting surface 323 that mates with the other end of the second baffle 55. Figure 16 As shown, during the process of inserting only the positive pin 92 of the plug 9 into the socket, the positive pin 92 presses down on the positive blocking part 32 of the protective door 3. At this time, one end of the second baffle 55 is located in the upper limit of the first direction within the limiting groove 322, and the other end of the second baffle 55 is in blocking cooperation with the second limiting surface 323 in the second direction.

[0079] like Figure 18 As shown, the cover plate 2 has a protruding positioning ring 25 on the side facing the pressure plate 5, and the protective door 3 is slidably disposed within the positioning ring 25 by a spring 4. Of course, the positioning ring 25 can also be disposed on the pressure plate 5.

[0080] Optionally, the cover plate 2 has a protruding sliding rib 24 on the side facing the pressure plate 5, and the sliding rib 24 is located between the first negative electrode through hole 22 and the first positive electrode through hole 23. The sliding part 33 of the protective door 3 is limited between the sliding rib 24 of the cover plate 2 and the sliding rib 56 of the pressure plate 5. Preferably, the surface of the sliding rib 24 that cooperates with the sliding part 33 of the protective door 3 is an arc-shaped surface; the surface of the sliding part 33 that cooperates with the sliding rib 24 is a plane.

[0081] like Figures 18-19 As shown, the cover plate 2 is provided with a first spring limiting part 26 for one end of the limiting spring 4, and a second spring limiting part 34 for the other end of the limiting spring 4 is provided between the negative electrode blocking part 31 and the positive electrode blocking part 32 of the protective door 3. Preferably, the first spring limiting part 26 is a cylindrical structure of the positioning ring 25 on one side in the second direction, and the second spring limiting part 34 is a cylindrical structure of the sliding part 33 on one side in the second direction. One end of the spring 4 is fitted onto the first spring limiting part 26, and the other end of the spring 4 is fitted onto the second spring limiting part 34.

[0082] like Figure 25 As shown, the inner cavity 82 of the base 8 is provided with a plurality of positioning cavities 83. The negative electrode socket assembly 6 and the positive electrode socket assembly 7 are respectively disposed in the positioning cavities 83.

[0083] like Figure 1As shown, during assembly, first, the negative electrode socket assembly 6 and the positive electrode socket assembly 7 are installed into the positioning cavity 83 of the base 8; then, the protective door 3 is installed into the positioning ring 25 of the cover plate 2; then, one end of the spring 4 is fitted onto the first spring limiting part 26 of the protective door 3, and the other end of the spring 4 is fitted onto the second spring limiting part 34 of the cover plate 2; then, the pressure plate 5 is installed on the cover plate 2, wherein the sliding rib 56 of the pressure plate 5 abuts against the back of the sliding part 33 of the protective door 3; then, the cover plate 2 is installed on the base 8; finally, the panel 1 is installed on the base 8.

[0084] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0085] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A DC socket structure, comprising a cover plate (2), a protective door (3), a spring (4), a pressure plate (5), a negative terminal socket assembly (6), a positive terminal socket assembly (7), and a base (8). The negative electrode socket assembly (6) and the positive electrode socket assembly (7) are disposed in the inner cavity (82) of the base (8), and the pressure plate (5) is disposed on the base (8) to confine the negative electrode socket assembly (6) and the positive electrode socket assembly (7) in the inner cavity (82); The cover plate (2) covers the pressure plate (5) and limits the protective door (3) and the spring (4) between the cover plate (2) and the pressure plate (5). The cover plate (2) is provided with a first negative electrode through hole (22) and a first positive electrode through hole (23). The length direction of the first negative electrode through hole (22) is set along a first direction, and the length direction of the first positive electrode through hole (23) is set along a second direction. The first direction and the second direction are perpendicular to each other. The pressure plate (5) is provided with a second negative electrode through hole (52) corresponding to the first negative electrode through hole (22) and a second positive electrode through hole (53) corresponding to the first positive electrode through hole (23); Its features are: The protective door (3) includes a negative electrode blocking part (31) and a positive electrode blocking part (32). The protective door (3) is slidably disposed and can slide between a first position and a second position. The protective door (3) can slide from the first position to the second position under the combined action of external forces on both the negative electrode blocking part (31) and the positive electrode blocking part (32); the spring (4) is used to drive the protective door (3) to slide from the second position to the first position, so that the positive electrode blocking part (32) blocks the first positive electrode through hole (23) and the negative electrode blocking part (31) blocks the first negative electrode through hole (22); The pressure plate (5) has a first baffle (54) and a second baffle (55) protruding from it; The protective door (3) can rotate until the first baffle (54) blocks the path of the negative electrode blocking part (31) moving to the second position only when the negative electrode blocking part (31) is subjected to external force. The protective door (3) can rotate until the second baffle (55) blocks the path of the positive electrode blocking part (32) moving to the second position only when the positive electrode blocking part (32) is subjected to external force.

2. The DC socket structure according to claim 1, characterized in that: The pressure plate (5) has a protruding sliding rib (56) located between the second negative electrode through hole (52) and the second positive electrode through hole (53). The protective door (3) also includes a sliding part (33) connected between the negative electrode shielding part (31) and the positive electrode shielding part (32). The protective door (3) is mounted on the sliding rib (56) through the sliding part (33).

3. The DC socket structure according to claim 2, characterized in that: The length direction of the sliding rib (56) is arranged along the second direction, and the surface of the sliding rib (56) that is used to cooperate with the sliding part (33) is an arc-shaped surface; the surface of the sliding part (33) that is used to cooperate with the sliding rib (56) is a plane.

4. The DC socket structure according to claim 1, characterized in that: The negative electrode blocking part (31) has a negative electrode driving slope (311) corresponding to the first negative electrode through hole (22) on one side in the second direction, and the positive electrode blocking part (32) has a positive electrode driving slope (321) corresponding to the first positive electrode through hole (23) on one side in the first direction.

5. The DC socket structure according to claim 4, characterized in that: The plane formed by the first direction and the second direction is a common plane, and the projections of the hypotenuse of the negative driving inclined plane (311) and the hypotenuse of the positive driving inclined plane (321) onto the common plane are perpendicular to each other.

6. The DC socket structure according to any one of claims 1-5, characterized in that: The first baffle (54) is a straight structure and is located on one side of the second negative electrode through hole (52) in the second direction. The negative electrode blocking part (31) is provided with a first limiting surface (312) that cooperates with the first baffle (54).

7. The DC socket structure according to any one of claims 1-5, characterized in that: The second baffle (55) has an L-shaped structure and is located on one side of the second positive electrode through hole (53) in the second direction. The positive electrode blocking part (32) facing the pressure plate (5) is provided with a limiting groove (322) that cooperates with one end of the second baffle (55). The positive electrode blocking part (32) is also provided with a second limiting surface (323) that cooperates with the other end of the second baffle (55).

8. The DC socket structure according to claim 1, characterized in that: The cover plate (2) has a protruding positioning ring (25) on the side facing the pressure plate (5), and the protective door (3) is slidably disposed in the positioning ring (25) by means of a spring (4).

9. The DC socket structure according to claim 1, characterized in that: The cover plate (2) is provided with a first spring limiting part (26) for one end of the limiting spring (4), and a second spring limiting part (34) for the other end of the limiting spring (4) is provided between the negative pole blocking part (31) and the positive pole blocking part (32) of the protective door (3). And / or, the cover plate (2) has a sliding rib (24) protruding on the side facing the pressure plate (5), and the sliding rib (24) is located between the first negative electrode through hole (22) and the first positive electrode through hole (23).

10. The DC socket structure according to claim 2, characterized in that: The protective door (3) is a one-line block structure formed by the negative electrode blocking part (31), the sliding part (33) and the positive electrode blocking part (32) being connected in sequence along the first direction.

Images